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There's no point in pulling the relays. In all my years of working on vehicles I've never known a relay to go bad. Your problem might be an ignition switch. This should be mounted under the dash, and is fairly inexpensive. With no blown fuses, no immediate wiring damage found, that's about the only thing I can think of.
Definitely check the ground connections to the chassis in the rear of the car. IIRC, there is a bundle of grounds around a bolt on the driver's side in the rear near that tail light.
What version of the car body do you have? We have also seen where the license plate lights have taken out the brake lights- but that's usually a blown fuse.
Something that is bothering me is that the brake lights should work without the ignition on- I think.. I'll have to check that this morning.
Definitely check the ground connections to the chassis in the rear of the car. IIRC, there is a bundle of grounds around a bolt on the driver's side in the rear near that tail light.
What version of the car body do you have? We have also seen where the license plate lights have taken out the brake lights- but that's usually a blown fuse.
Something that is bothering me is that the brake lights should work without the ignition on- I think.. I'll have to check that this morning.